<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
</head>
<body>
    <!--头部-->
    <div id="head" style="width: 100%;height: 30px;background-color: #dff0d8"></div>
    <!--中间-->
    <div id="middle" style="width: 100%;height: 450px;background-color: #8a6d3b"></div>
    <!--底部-->
    <div id="bottom" style="width: 100%;height: 80px;background-color: #dff0d8"></div>
</body>
</html>